Discussion:
refractive index
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RichD
2023-11-27 21:51:14 UTC
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I visited an opthol... an eye doctor yesterday, he said
I have a 1.5 refractive index.

What does that mean, in opthol... eye medicine?

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Rich
Joe Gwinn
2023-11-27 23:29:36 UTC
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On Mon, 27 Nov 2023 13:51:14 -0800 (PST), RichD
Post by RichD
I visited an opthol... an eye doctor yesterday, he said
I have a 1.5 refractive index.
What does that mean, in opthol... eye medicine?
The refractive index of pure water is 1.333 and of fused silica
1.4585, so 1.5 would be difficult for an eye; these are more like
1.40.

In this context, an eye doctor probably means diopters.

Joe Gwinn
RichD
2023-12-01 23:02:36 UTC
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Post by Joe Gwinn
Post by RichD
I visited an opthol... an eye doctor yesterday, he said
I have a 1.5 refractive index.
What does that mean, in opthol... eye medicine?
The refractive index of pure water is 1.333 and of fused silica
1.4585, so 1.5 would be difficult for an eye; these are more like 1.40
In this context, an eye doctor probably means diopters.
Sounds like a case of jargonitis.
Like, aberration has a handful of definitions -

--
Rich
Joe Gwinn
2023-12-01 23:09:47 UTC
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On Fri, 1 Dec 2023 15:02:36 -0800 (PST), RichD
Post by RichD
Post by Joe Gwinn
Post by RichD
I visited an opthol... an eye doctor yesterday, he said
I have a 1.5 refractive index.
What does that mean, in opthol... eye medicine?
The refractive index of pure water is 1.333 and of fused silica
1.4585, so 1.5 would be difficult for an eye; these are more like 1.40
In this context, an eye doctor probably means diopters.
Sounds like a case of jargonitis.
Like, aberration has a handful of definitions -
Could be. Maybe he said refractivity.

Anyway, in ophthalmology they use only Newtonian (thin lens) Optics,
where diopters are defined:

.<https://en.wikipedia.org/wiki/Thin_lens>

Joe Gwinn

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